Different models to fit the left or right ear (right is most popular) in beige, mid brown or dark brown. The roll-top battery tray also functions as an on/off switch. These devices have a well defined generic anatomical profile to combine discretion and comfort with good audio intelligibility. The earphones have a replaceable wax guard system to eliminate problems caused by ear wax. A range of inductive neck loops and shoulder are also available for these products.